20
7
WIRING DIAGRAM
PUMY-P48NHMU PUMY-P48NHMU-BS PUMY-P48NHMU
1
PUMY-P48NHMU
1
-BS
1 2 3 4 5 6 7 8
[Example]
When the compressor and
SV1 are turned during cooling
operation.
SYMBOL
NAME
SYMBOL
NAME
SYMBOL
NAME
TB1
Terminal Block <Power Supply>
TB3
Terminal Block <Transmission>
TB7
Terminal Block <Contralized Control>
MC
Motor for Compressor
MF1,MF2
Fan Motor
21S4
Solenoid Valve<Four way valve>
SV1
Solenoid Valve<Bypass valve>
TH3
Thermistor<Outdoor Pipe Temperature>
TH4
Thermistor<Discharge Temperature>
TH6
Thermistor<Low Pressure Saturated Temperature>
TH7
Thermistor<Outdoor Temperature>
TH8
Thermistor<Heatsink>
63HS
High Pressure Sensor<Discharge Pressure>
63H
High Pressure Switch
63L
Low Pressure Switch
CB
Main Smoothing Capacitor
ACTM
DCL
Active filter Module
RS
Rush Current Protect Resistor
P.B.
Power Circuit Board
Connection Terminal<U/V/W-Phase>
U/V/W
MULTI.B.
Multi Controller Board
Fuse<6.3A>
F1,F2
Fuse<3A>
F500
Switch<Display Selection>
SW1
Switch<Function Selection>
SW2
Switch<Test Run>
SW3
Switch<Model Selection>
SW4
Switch<Function Selection>
SW5
Switch<Function Selection>
SW6
Switch<Function Selection>
SW7
Switch<Function Selection>
SW8
Switch<Unit Address Selection, 1s digit>
SWU1
Switch<Unit Address Selection, 10ths digit>
SWU2
Transfomer
TRANS
Digital Indicator<Operation Inspection Display>
LED1,2
LED<Power Supply to Main Microcomputer>
LED3
Connector<Multi System>
CNS1
Connector<Centralized Cotrol>
CNS2
Connector<To Noise Filter Circuit Board>
CNAC
Connector<Power circuit board>
CNDC
Connector<To Power Circuit Board>
CN2
Connector<To Power Circuit Board>
CN4
Connector<Centralized Cotrol Power Supply>
CN40
Connector<For storing Jumper Connector>
CN41
Connector<Thermistor>
TH3
Connector<Thermistor>
TH4
Connector<Thermistor>
TH7/6
Connector<High Pressure Sensor>
63HS
Connector<High Pressure Switch>
63H
Connector<Low Pressure Switch>
63L
Connector<Fan Motor>
CNF1,CNF2
Connector<Four-way Valve>
21S4
Connector<Bypass Valve>
SV1
Connector<For Option>
SS
Connector<For Option>
CN3D
Connector<For Option>
CN3S
Connector<For Option>
CN3N
Connector<For Option>
CN51
Relay
X501~505
M-P.B.
Connector<To Noise Filter Circuit Board>
Transmission Power Board
CN1
Connector<To Multi Controller Board>
CN2
Terminal<L/N-Phase>
TAB-S/T
Terminal<DCVoltage>
TAB-P/P1/P2
Terminal<DCVoltage>
TAB-N/N1/N2
Connector
CN2~5
N.F.
Noise Filter Circuit Board
Connection Lead<L-Phase>
LI/LO
Connection Lead<N-Phase>
NI/NO
Connection Terminal<Ground>
EI
Connector
CNAC1/2
Connector
CN5
Connector
CNDC
Connector
CNAF
Inverter
IPM
Light Emitting Diodes <Inverter Control Status>
LED1
Reactor
Bit
Indication
1
Compressor
operated
2
52C
3
21S4
4
SV1
5
(SV2)
6
–
7
–
8
Always lit
During normal operation
The LED indicates the drive state of the controller in the outdoor unit.
When fault requiring inspection has occurred
The LED alternately indicates the inspection code and the location of the unit in which
the fault has occurred.
Use copper supply wires.
NOTES:
1.Refer to the wiring diagrams of the indoor units for details on wiring of each indoor unit.
Self-diagnosis function
The indoor and outdoor units can be diagnosed automatically using the self-diagnosis switch
(SW1) and LED1, LED2 (LED indication) found on the multi-controller of the outdoor unit.
LED indication : Set all contacts of SW1 to OFF.
Cautions when Servicing
Caution for electrical work
!
WARNING: When the main supply is turned off, the voltage [340 V] in the main capacitor will drop to 20 V in approx. 2
minutes (input voltage: 240 V). When servicing, make sure that LED1, LED2 on the outdoor circuit board goes out, and then
wait for at least 1 minute.
Components other than the outdoor board may be faulty: Check and take corrective action, referring to the service manual.
Do not replace the outdoor board without checking.
